How do trees contribute to improving urban air quality?

Trees play a vital role in improving urban air quality primarily by absorbing carbon dioxide and filtering pollutants. As photosynthetic organisms, trees take in carbon dioxide, which helps reduce the greenhouse effect and combat climate change. Moreover, they have the ability to filter out harmful pollutants such as sulfur dioxide, ammonia, and nitrogen oxides from the air. The leaves and branches of trees capture particulate matter, including dust, smoke, and other aerosol pollutants, effectively acting as natural air filters.

While releasing oxygen is an important function of trees, it is not the primary mechanism through which they improve air quality in urban environments. The production of moisture can also aid in air quality, but it is through the direct absorption of carbon dioxide and filtering of pollutants that trees significantly enhance the cleanliness of urban air. Additionally, the improvement of soil quality is important for overall ecosystem health but does not directly impact air quality in the same way that pollutant absorption does. Thus, the ability of trees to absorb carbon dioxide and filter pollutants makes them indispensable in maintaining and improving urban air quality.